Frank wolfendef



- F. WOLFENDEN.

HYDRAULIC VALVE.

(Application filed June 28, 1897.)

(No Model.)

wi lmaooeo iuwwk Patented Jan. l0, |899.

v" new? i. t -a oils net "hill; VALVE,

fil fifi'isfififififiiiifcrninng'pmt' offf o were I Application filed lime 25,1897! Serial. lie; 642,474. Clio moriel.)

To all whom it may concern:

Be it known that I, FRANK Wonsnimnn, of Grcen'ville, in the county of Washington and State of Mississippi, have invented certain new and useful improvements in Hydraulic Valves; anal do hereby (leclere the following tial.

to be a full, clear, and; exact description of the invention, such as will enable others skilled in the towhich it eppcrteins to make and improvements in hydraulic valves, chiefly useful in connection with cottonseed presses, but applicsblcof co nrse to other uses as Well. in the practical employment of cotton-seed presses which extract the oil from the seerl it i s l-Ilil important that the seed pieced L i. panes shall he quickly brought to substantially thetstete oi coinpsctnessortliat degree of pressure Where the oil begins to exude from the seed for the sake of economy of time in the operation, Nhen the seed is brought to substantially this condition, however, it has been found that a continued quick and. forceful action of the pressplungers abuses and disrnpts or damages the pressclo'ths, which are quite costly, rennet-log unnecessarily-repented renewals thereof essen- Therefore it is desirable that the latter port of the pressing operation to extract the oil from the seed shall be effected slowly to avoid such violent and injurious action on the press-cloths.

it is the object of my invention to provide a new and improved valve for effecting" this manner of operation and which shall be sim ple in construction and require the minimum of attention in action; and to this encl the invention consists in a valve having the novel construction, arrangement, and operation of parts hereinafter described and clsizncil, reference being heal to the accompanying drewing, wherein the figure is a central vertical sectional view of a valve embodying my in vention, the valve-stem whereof is shown in its lowered position in full lines and in its raised position'in dotted lines.

Referring to the Growing, the nun1erel1in-' dzcates e vclvecasing; scrcw threuiecl inter nclly, as inilicetcl by the numeral 2, for the reception of on ontcrno crew-threaded the casing with a, flange 5, seated-upon s washer (i, retained in an annular recess 7 in the casing. This plug is provided with square or hexagonal portion 8, recessed and internally screw-threadegi for the reception of a lo which is seated u on a, washer 10L Seated upon the annular shoulder 11, near 4 the central portion of the casing, is a, washer o 12, which adapted to serve s pecking; between the plug 2 and the casing when the plug is in its normal position within the casing.

Extending vertically throng-l1 the plugs l end 9 is a, vslvesteni 13 "oro'videdwith a .l:

ternally-soreW-tlireslled portion ll, which is a' icptecl to enter the internal sorewlliresds in thecenter of the plug 2.

The numeral 15 imlicetes a cavity formed the under side of the plug and which communicates with an annular cavity 16 in the lower portion of theorising 1. These cavities form a chamber 17, in which Works the lower end 18 of the valve-stein 13,

The numeral 19 indicates an annular shoul- (ler which is formed near the lower end of the valve-stem and is adopted to bear against the seat 20 at the bottom of the plug 4: to close communication between the cavities l5 and 16 when the valve-stem is liftccl,

The numeral 26 indicates an exhaust-pas sage from the cylinder of; the press, loading from the cavity 15, forming the upper portion of the chamber 17, and the numeral 22- indicates a supply or feed passage leading to the press-cylinder from the cavity 16, forming the lower portion of said chamber and through which all or WZtlZG'l is forced by the high and. low pressure pumps.

The numeral 23 indicates a check-valve seat d in a recess 2i in the lower portion of the casing 1 and edsptetito be held therein by e cone-shaped point 24; at the lower en lof the valve-stem. v

The numeral 25 indicates a section of the valve-casing which is connected to the eastoo in the section 25 of the valve-casing, and concontrol the maximum supply of high pressure,

as will be obvious.

The numeral 32 indicates an internallyscrew-threaded coupling-socket in the lower portion of the section 25 of the valve-casing to receive a screw-threaded pipe leading from the low-pressure engine.

The numeral 33indicates aduet communicating with and extending. upwardly from the, socket and entering a pocket 34, in which is seated a check-valve 35, confined therein by stops 34. In practice the valve 35 is seated in the pocket 34, and then the stops are properly secured in place. This can be done in any way known to those skilled in mechanics. The particular means of securing the stops form no part of my invention.

The numeral 36 indicates an internallyscrew threaded couplingsocket, 'which is adapted to receive the end of a pipe leading from the high-pressure engine and from which a duct or passage 37 leads to the pocket 38, in which is seated a check-valve 39, the upward movement of which is regulated by the screw-threaded rod 30, said rod being adjusted in. the plug 28 so as to bring its end 31 into some selected position relative to the check-valve 39. It will be seen, therefore, that the check-valve cannot leave its seat more than a predetermined distance, controlled by the adjusted position of the. rod 30, and that thereby the maximum supply of high pressure is controllable.

The operation of my improved valve is as follows: The high and low, pressure pumps both being in operation and in communication with the common duct 27, the valve-stem 13 is operated, lifting the point 24: from the top of the valve 23, leaving saidvalve free to rise, and at the same time closing against its seat 20, cutting out the exhaust-passage 26 and compelling the oil,water, or other medium to pass to the press-cylinder through the feedpassage 22. Thus the water and oil from both the low-pressure and high-pressure engines go into the duct 27, traverse the same, lift the valve 23, and together pass by way of the feed'passage 22 to the cylinder of the press. Their combined force quickly reduces or compacts the seed into substantially that condition where the oil begins to exude from the seed. It would be injurious, as before stated, to permit the continued quick operation of the plungers under the impulse of the combined force of the high and low pressure engines, because the press-cloths would be in jured by the violent action 'of the plunger-s, as hereinbefore stated. 4

According to my invention and the opera tion of my improved valve, the pressureof the combined high and low pressure engin'es soon establishes a back pressure, which fills the duct 27 and overbalances the low pressure, whereupon the check-valve 35 is automaticall y forced to its seat by the overbalancing pressure in the duct 27 and cuts out the supply of low pressure, leaving the high pressure to slowly continue the pressing operation and avoiding the injurious and violent action of the plungers on the press-cloths.

After the cotton-seed has been pressed to the desired degree the valve-stem 1.3 is turned to the position shown in full lines in the draw ing, closing communication between the duct 27 and the press and simultaneously establishing communication between the feedpassage 22 and the exhaust-passage 26,whereupon the oil or water will exhaust through the latter.

It will be seen that according to my invention'and the operation of my improved valve the supply of pressure to the press from both the high and low pressure engines is started and cut off by a single manually-operated valve and that this valve also serves to simultaneously establish and cut off communication between the press and the exhaust-pas sage, and that, furthermore, both thehigh and low pressure power is initially employed duringaportion of the operation of pressing and that the low-pressure power is automatically cut out by the overbalancing high pressure when it has, in connection with the high pressure, served its purpose.

Having thus fully described my invention, WhatI claim, and desire to secure by Letters Patent, is-

1. In ahydraulic valve for presses, the combination with a casing having valved passages communicating with high and low pressure engines, the valve of the low-pressure passage being automatic and adapted to be closedby the high-pressure fluid, and a chamber provided with press supply and exhaust passages, of a valve in said casing arranged to simultaneously start the supply from both the high and low pressure engines and control said supply and exhaust passages, sub stantially as described.

2. In ahydraulic valve for presses, tl combination with a casing, valved high ant low pressure passages communicating therewith, the valve of the low-pressure passage being automatic and arranged to be closed by the high pressure, said casing also having press supply and exhaust passages, of a single valve arranged to control said'supply and exhaust passages and to also simultaneously permit and cut off the supply of fluid to the presscylinder from the high and low pressure engines, substantially as described.

3. In a hydraulic valve for presses, the com-- bination of a casing having passages communicating with high and low pressure engines,

the low-pressure passage being provided with an automatic valve, whereby the valveof the low-pressure passage will be closed by the high pressure, said casing also having a cham- I cylinder, substantially as described.

4. Ina hydraulic valve for presses, the combination with a casing having passages communicating with high and low pressure engines, an, autom atie. valve in thelow-pressure tpassage, whereby the valve of the low-pres sure. passage is automatically operated by-the high pressure to cutoff the supply of low pressure, said casing also having press supply and exhaust passages, and a duct from the high and lovs' pressure passagesto the presssupply passage, an d a single valve arranged in said casing to control the press supply and exhaust passages and to also simultaneously open and'close the duct from the high and low pressure passages, substantially as described.

5. In a hydraulic valve for presses, the combination of a casing having'passages communicating with high and low pressure engines, an automatic valve in the low-pressure passage and a throttled' valve in the high-pressure passage, the valve of the low-pressure passage adapted to be closed by the high pressure, said casing also having a chamber provided with press supply and exhaust passages and a single valve arranged insaid casing between the high and low pressure passages and the .pressssnpply passageand "serving to controling witnesses.

FRANK WOLFENDEN.

f lVitnesses:

HENRY CUTTENDEN,

GEO. B. ALEXANDER. 

